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Keywords: damping
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Proceedings Papers

Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT27A033, June 13–17, 2022
Paper No: GT2022-83393
... Abstract Increasing demand on turbine power and efficiency requires larger and higher loaded turbine blades, which in turn requires the consideration of aeromechanical interactions. Whilst CFD tools can reliably predict stability using aerodynamic damping as an indicator, the component...
Proceedings Papers

Proc. ASME. GT2022, Volume 8A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Engineering Design, Analysis, and Additive Manufacturing; Fatigue, Fracture, and Life Prediction, V08AT23A006, June 13–17, 2022
Paper No: GT2022-83889
... additive manufacturing laser powder bed fusion design modelling damping optimization vibrations blade gas turbine turbine engine Abstract Despite nearly 100 years of turbine engine design and development, blade vibrations still remain an important engineering challenge...
Proceedings Papers

Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT27A028, June 13–17, 2022
Paper No: GT2022-82960
... Abstract Gas turbine rotor system is subjected to vibratory stresses due to excitations caused by various excitation sources at varying energy levels. To dissipate the energy that occurs in the rotating system, damping is induced internally or externally. Damping is achieved by having damper...
Proceedings Papers

Proc. ASME. GT2022, Volume 8B: Structures and Dynamics — Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V08BT27A006, June 13–17, 2022
Paper No: GT2022-80643
... of the mistuning pattern and the actually machined implementation due to manufacturing deviations. mistuning blade vibration damping Proceedings of ASME Turbo Expo 2022 Turbomachinery Technical Conference and Exposition GT2022 June 13-17, 2022, Rotterdam, The Netherlands GT2022-80643 MISTUNING...
Proceedings Papers

Proc. ASME. GT2021, Volume 1: Aircraft Engine; Fans and Blowers; Marine; Wind Energy; Scholar Lecture, V001T41A001, June 7–11, 2021
Paper No: GT2021-60864
... and development phases are dynamic in nature. These can jeopardize engine certification and lead to major delays and increased program cost. A real challenge is the characterization of damping and the related dynamic behavior of rotating and stationary components and assemblies, and of the fluid-structure...
Proceedings Papers

Proc. ASME. GT2021, Volume 9A: Structures and Dynamics — Aerodynamics Excitation and Damping; Bearing and Seal Dynamics; Emerging Methods in Design and Engineering, V09AT23A004, June 7–11, 2021
Paper No: GT2021-58782
... Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-58782 EXPERIMENTAL DAMPING BEHAVIOR OF STRONGLY COUPLED STRUCTURE AND ACOUSTIC MODES OF A ROTATING DISK WITH SIDE CAVITIES Botond Barabas1, Friedrich-Karl Benra1...
Proceedings Papers

Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT28A002, June 7–11, 2021
Paper No: GT2021-58824
... researchers have studied the response characteristics coupled dual-rotor system with an intershaft bearing and of rotor-SFD system and the damping effect of SFD. Zhu et al. uncentralized squeeze film damper is established by using finite [1] compared the damping effect of centralized and element method. Based...
Proceedings Papers

Proc. ASME. GT2021, Volume 9B: Structures and Dynamics — Fatigue, Fracture, and Life Prediction; Probabilistic Methods; Rotordynamics; Structural Mechanics and Vibration, V09BT29A019, June 7–11, 2021
Paper No: GT2021-59283
... Proceedings of ASME Turbo Expo 2021 Turbomachinery Technical Conference and Exposition GT2021 June 7-11, 2021, Virtual, Online GT2021-59283 MISTUNING AND DAMPING OF A RADIAL TURBINE WHEEL. PART 1: FUNDAMENTAL ANALYSES AND DESIGN OF INTENTIONAL MISTUNING PATTERN Alex Nakos Bernd Beirow Brandenburg...
Proceedings Papers

Proc. ASME. GT2020, Volume 11: Structures and Dynamics: Structural Mechanics, Vibration, and Damping; Supercritical CO2, V011T30A018, September 21–25, 2020
Paper No: GT2020-14922
.... With the advent of Additive Manufacturing (AM), new damping techniques can now be incorporated directly into the design and manufacture process to suppress the vibrations that cause HCF. Recent work has been investigating new ways of using AM for turbine engine applications. A specifically innovative approach...
Proceedings Papers

Proc. ASME. GT2020, Volume 11: Structures and Dynamics: Structural Mechanics, Vibration, and Damping; Supercritical CO2, V011T30A030, September 21–25, 2020
Paper No: GT2020-15490
... (HCF) is key challenge due to many unknown/uncertain parameters in operation such as constraints of hardware, damping capability, nature and magnitude of dynamic loads. This paper is focused on structural dynamic design process of NovaLT™ annular combustors. While operating in inherent vibratory...
Proceedings Papers

Proc. ASME. GT2020, Volume 8: Industrial and Cogeneration; Manufacturing Materials and Metallurgy; Marine; Microturbines, Turbochargers, and Small Turbomachines, V008T18A002, September 21–25, 2020
Paper No: GT2020-14122
...Abstract Abstract The fatigue life behavior and internal surface conditions of inherently damped Additive Manufactured (AM) specimens subjected to vibration bending are under investigation. This study supports research that demonstrated 95% vibration suppression due to damping capability of AM...
Proceedings Papers

Proc. ASME. GT2020, Volume 10A: Structures and Dynamics, V10AT25A020, September 21–25, 2020
Paper No: GT2020-15008
... hydrodynamical characteristics and dynamic stiffness and damping coefficients of hybrid and hydrostatic bearings with increased accuracy and which can be used for engineering/design purposes. The developed approach is based on Reynold’s equations, where the unknown parameters are the rotor position and fluid...
Proceedings Papers

Proc. ASME. GT2019, Volume 7B: Structures and Dynamics, V07BT34A005, June 17–21, 2019
Paper No: GT2019-90195
...Abstract Abstract Controversy regarding the dynamic modeling of tilting-pad journal bearings (TPJB) has existed for years, with the question of the effective stiffness and damping properties, and the requirement for consideration of frequency dependency, being of great concern...
Proceedings Papers

Proc. ASME. GT2012, Volume 5: Manufacturing Materials and Metallurgy; Marine; Microturbines and Small Turbomachinery; Supercritical CO2 Power Cycles, 837-846, June 11–15, 2012
Paper No: GT2012-69403
... 1 Copyright © 2012 by ASME CHARACTERIZATION OF STIFFNESS AND DAMPING IN TEXTURED SECTOR-PAD MICRO- THRUST BEARINGS USING COMPUTATIONAL FLUID DYNAMICS C.I. Papadopoulos School of Naval Architecture and Marine Engineering, National Technical University of Athens, 15710 Zografos, Greece P.G...
Proceedings Papers

Proc. ASME. GT2010, Volume 6: Structures and Dynamics, Parts A and B, 11-23, June 14–18, 2010
Paper No: GT2010-22058
... allows determining direct and cross-coupled stiffness coefficients of the seal by integrating measured circumferential pressure distribution in cavities at various shaft eccentric positions. In the dynamic method, identification of stiffness and damping coefficients is based on the rotor excitation using...
Proceedings Papers

Proc. ASME. GT2009, Volume 6: Structures and Dynamics, Parts A and B, 657-667, June 8–12, 2009
Paper No: GT2009-59173
... and inlet pressures. Generally, the rotordynamic performance degrades at other operating conditions. Additional study for the seals with enlarged clearance is carried out to model effect of wear. leakage stiffness damping whirl-frequency ratio diverging taper converging taper computational fluid...
Proceedings Papers

Proc. ASME. GT2008, Volume 1: Aircraft Engine; Ceramics; Coal, Biomass and Alternative Fuels; Manufacturing, Materials and Metallurgy; Microturbines and Small Turbomachinery, 689-695, June 9–13, 2008
Paper No: GT2008-50570
... 04 08 2009 The forced response of a gas foil bearing (GFB), a typical rotor support in oil-free microturbomachinery, relies heavily on its resilient bump-strip layers structure, which also offers dry-friction type damping to ameliorate rotor vibrations. Operation at high temperature...
Proceedings Papers

Proc. ASME. GT2005, Volume 4: Turbo Expo 2005, 477-482, June 6–9, 2005
Paper No: GT2005-68899
... 03 11 2008 A multidimensional finite element model of a viscoelastic sliding bearing is presented. The model resulted into a simplified finite element model composed by an elastic matrix and a damping matrix. These matrices are independent from each other since the viscoelastic...